#include <cstring>

#include <fstream>

#define maxn 2000005

using namespace std;

int rasp[maxn], nr;

ifstream cin("strmatch.in");
ofstream cout("strmatch.out");

void computeLPSArray(char* pat, int M, int* lps);



void rez1(char* pat, char* txt)
{

    int M = strlen(pat);

    int N = strlen(txt);
    int lps[M];
    computeLPSArray(pat, M, lps);

    int i = 0;
    int j = 0;
    while(i < N)
    {
        if(pat[j] == txt[i])
        {
            i++;
            j++;
        }
        else
        {
            if(j == M)
                rasp[++nr] = i - j, j = lps[j - 1];
            else if( i < N && pat[j] != txt[i])
                if(j)
                    j = lps[j - 1];
                else
                    i++;

        }
    }

}

void computeLPSArray(char* pat, int M, int* lps)
{
    int i = 1;
    int lens = 0;
    lps[0] = 0;
    while(i < M)
    {
        if(pat[lens] == pat[i])
        {
            lens++;
            lps[i] = lens;
            i++;
        }
        else
        {
            if(lens > 0)
                lens = lps[lens-1];
            else
            {
                lps[i] = 0;
                i++;
            }

        }
    }
}
char pat[maxn], txt[maxn];
int main()
{
    cin >> pat >> txt;
    rez1(pat, txt);
    cout << nr << '\n';
    for(int i = 1; i <= nr; i++)
        cout << rasp[i] << ' ';
    return 0;
}